thank you for your question.
1. If you will soon graduate you should use the special rule for new graduates.
Please read http://a-kasser.dk/graduates
You will get about DKK 14.690 month = 82% of maximum unemployment benefit.
2. To be entitled to 100% unemployment benefits when you become unemployed,
you must have had at least 52 weeks of work within the last three years and been a member
of an unemployment insurance fund for at least one year.
You tell you have signed with a-kasse through PROSA. PROSA is a UNION,
NOT an a-kasse.
You should have been member of an A-kasse for one year. Please check that!
If you only have been member of PROSA not an A-kasse then I will suggest that you
use the rule for new graduates. You will only get 82% of fulle unemployment benefit,
but its better than nothing..